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Questions About main sequence star orbits

What is the order in which two low-mass main-sequence stars orbit each other?

a. A white dwarf orbits a more massive main sequence star. b. Star 1(the more massive star) begins to evolve off the main sequence. c. Star 1 fills its Roche lobe and begins transferring mass to the white dwarf d. The white dwarf either becomes a nova or a supernova e. Star 2 gains mass, becoming hotter and more luminous f. Star 2 fills its Roche lobe and begins transferring mass to the white dwarf I think there is a problem with the test, because I'm almost positive I know the answer. I just want to see what everyone else…

Does anyone know how to answer this Astronomy question?

The Chandra X-Ray Observatory has detected X rays from a star system that contains a main-sequence star of spectral type B6. The X-ray emission is strong and fairly steady, and no sudden bursts have been observed. Which of the following statements are reasonable conclusions about this system? Check all that apply. The main-sequence star is emitting X rays. The main-sequence star orbits either a neutron star or a black hole. The main-sequence star must orbit a black hole. Gas from the main-sequence star makes an accretion disk around another object. The main-sequence star orbits either a white dwarf or a…

Which of the following statements are reasonable conclusions about this system?ld you like to ask?

The Chandra X-Ray Observatory has detected X rays from a star system that contains a main-sequence star of spectral type B6. The X-ray emission is strong and fairly steady, and no sudden bursts have been observed. Which of the following statements are reasonable conclusions about this system?ld you like to ask? Check all that apply: - The main-sequence star orbits either a white dwarf or a neutron star. - Some time in the next few decades, this system will undergo a nova explosion. - The main-sequence star must orbit a white dwarf. - The main-sequence star orbits either a neutron…

Which of the following statements are reasonable conclusions about this system?

The Chandra X-Ray Observatory has detected X rays from a star system that contains a main-sequence star of spectral type B6. The X-ray emission is strong and fairly steady, and no sudden bursts have been observed. Which of the following statements are reasonable conclusions about this system? Check all that apply. 1. The main-sequence star must orbit a white dwarf. 2. The main-sequence star must orbit a neutron star. 3. Some time in the next few decades, this system will undergo a nova explosion. 4. Gas from the main-sequence star makes an accretion disk around another object. 5. The main-sequence