Food chains and food webs — practice question

The food web represents part of an ocean ecosystem. Which row gives the number of secondary consumers and the number of tertiary consumers in the food web?

• Anumber of secondary consumers: three; number of tertiary consumers: one
• Bnumber of secondary consumers: four; number of tertiary consumers: one
• Cnumber of secondary consumers: three; number of tertiary consumers: two
• Dnumber of secondary consumers: four; number of tertiary consumers: two