African American Percy Julian was a scientist and entrepreneur whose work helped people around the world to see. Named in 1999 as one of the greatest achievements by a US chemist in the past hundred years, ________ led to the first mass-produced treatment for glaucoma.

Which choice completes the text so that it conforms to the conventions of Standard English?

Question

Accepted Answer

Julian's 1935 synthesis of the alkaloid physostigmine

Answer

Julian synthesized the alkaloid physostigmine in 1935; it

Answer

in 1935 Julian synthesized the alkaloid physostigmine, which

Answer

the alkaloid physostigmine was synthesized by Julian in 1935 and