Select all 3 of the reactants (things needed) necessary for photosynthesis to occur. a. oxygen b. carbon dioxide c. sunlight d. water e. sugar (glucose)

The answers would be B. carbon dioxide, C. sunlight, and D. water!
Hope this helps!

Batteries always use direct current. That eliminates A and C. The other part of the answers is just asking what direct/alternating means. Alternating currents change directions moving one way then another. Direct current only moves in one direction. Therefore, the answer is D, since the current is direct and direct currents move in one direction.