American scientist melvin calvin's research contributed to the understanding of the process of photosynthesis. to which portion of the process does his work most directly apply? responses
a. the process of sugar production that occurs in the stroma
b. the movement of light through the membrane and into the thylakoid
c. the production and release of o2 during the light-dependent reaction
d. the movement of h2o into the thylakoid to be used as a raw material for photosynthesis