A) What is the third step in cellular respiration? (1 point)

C) the Krebs cycle

The third step in cellular respiration is the citric acid cycle, also known as the Krebs cycle. To find the correct answer, let's break down the options:

Option A: the citric acid cycle. This is also known as the Krebs cycle, so it matches one of the given options.

Option B: the electron transport chain. This is not the correct answer, as it is the fourth step in cellular respiration, not the third.

Option C: the Krebs cycle. This is the correct answer, matching option A.

Option D: glycolysis. This is the first step in cellular respiration, not the third.

Therefore, the correct answer is the citric acid cycle, or the Krebs cycle.