Which of the Following Conclusions Is Supported by This Graph

Multiple Choice

Which of the following conclusions is supported by this graph?

A) Prey size does not affect the number of calories gained per second of handling time by wagtails.
B) Wagtails get more calories per second of handling time with larger flies than with smaller ones.
C) Wagtails get more calories per second of handling with 7- mm flies than with either larger or smaller ones.
D) Wagtails get more calories per second of handling time with smaller flies than with larger ones.