Step 1: Know the task.
We must match four scientists with the discovery each one made about photosynthesis. Remembering one or two clearly will help us cut down the options.
Step 2: Joseph Priestley.
Priestley did the candle and mouse experiments and showed that green plants give out oxygen and refresh the air. So I matches D (green plants evolve oxygen).
Step 3: T.W. Engelmann.
Engelmann used a prism and bacteria to find which colours of light drive photosynthesis best. He gave the first action spectrum. So II matches E (first action spectra).
Step 4: Julius von Sachs.
Sachs showed that glucose is made in the green parts of the plant, where the chlorophyll is. So III matches A (green part makes glucose).
Step 5: Jan Ingenhousz.
Ingenhousz proved that sunlight is needed for the plant to release oxygen, so light is required for photosynthesis. So IV matches B (light is required).
Step 6: Combine the matches.
We get I-D, II-E, III-A, IV-B, which is the first option.
\[ \boxed{\text{I-D, II-E, III-A, IV-B}} \]