Climate change could make it too hot to grow certain crops, and droughts caused by climate change could reduce the amount of water available for irrigation. Climate change is also likely to cause stronger storms and more floods, which can damage crops. Higher temperatures and changing rainfall patterns could help some kinds of weeds and pests to spread to new areas. —“A Student’s Guide to Global Climate Change,”
US Environmental Protection Agency

What problem is the author discussing in this section of the text?

a. the negative effect climate change has on crops
b. the decrease in rainfall over the past several years
c. the problem some areas have with weeds and pests
d. the longer heat waves caused by climate change