Ques. Quasars, at billions of light- years from earth the more distant observable objects in the universe, belived to be the cores of galaxies in an early stage of development.
(A) believed to be
(B) are believed to be
(c) some believe them to be
(D) some believe they are
(E) it is believed that they are
can anyone please explain the answer
(A) believed to be
(B) are believed to be
(c) some believe them to be
(D) some believe they are
(E) it is believed that they are
can anyone please explain the answer












