In addition to oxygen, what do plants produce during photosynthesis?
A. chlorophyll
B. sugar
C. carbon dioxide
D. light energy
Gathering carbon dioxide and water from air and soil, plants undergo a process that converts carbon dioxide into glucose and the water into oxygen [1, 2, 3, 4]. Glucose and oxygen are the by-products of this process [1, 2, 3]. Plants use light energy from the sun to carry out this process known as photosynthesis [1]. 

C
During photosynthesis, plants convert carbon dioxide and water, with the assistance of light, into glucose [1, 2, 3]. Chlorophyll traps the light needed to synthesize glucose and oxygen [1]. The resulting product of this process is glucose [1, 2, 3]. 

B