Which of the following is a probable effect of the fact mentioned in paragraph 4 that there are few available nesting locations near the Humboldt Current? A. Seabirds compete with each other for a limited supply of food. B. The number of seabirds at any one site is extremely large. C. Some seabirds nest in conifer forests near locust outbreaks. D. Colonies near the Humboldt Current contain small numbers of seabirds.