A star will compress itself into a white dwarf, a neutron star, or a black hole after it passes through a red giant stage, depending on mass.
depending on mass – present participle at the end of the sentence needs to modify the entire preceding clause
(A) A star will compress itself into a white dwarf, a neutron star, or a black hole after it passes through a red giant stage, depending on mass.
Issues with this:
a. It has no ambiguity – it is correctly referring to star and not white dwarf, a neutron star, or a black hole. There is no pronoun issue.
b. Depending on mass – a present participial modifying the entire preceding clause and modifies the previous clause namely' after it(the star) passes through a red giant stage. This is inappropriate because it should modify the ‘star’ and not the entire preceding clause.
c. Depending on mass of what? Does not make sense.
(B) After passing through a red giant stage, depending on its mass, a star will compress itself into a white dwarf, a neutron star, or a black hole.
Issues with this:
a. Depending on its mass: what is ‘it’? and this is a present participle that is modifying the red giant stage and not star. The modifier is misplaced.
(C) After passing through a red giant stage, a star’s mass will determine if it compresses itself into a white dwarf, a neutron star, or a black hole.
Issues with this:
a. After passing through a red giant stage, a star’s mass will determine if it – what is it?
b. A star’s mass – possessive
c. It - pronoun without an antecedent. No mention of star.
(D) Mass determines whether a star, after passing through the red giant stage, will compress itself into a white dwarf, a neutron star, or a black hole.
correct because:
a. after passing through the red giant stage – prepositional phrase that is modifying the noun ‘star’.
b. Mass will determine whether a star will compress itself – subject agrees with verb.
(E) The mass of a star, after passing through the red giant stage, will determine whether it compresses itself into a white dwarf, a neutron star, or a black hole.
Issues with this:
a. Mass of a star cannot pass through the red giant stage
b. The star passes through the red giant stage.