Refer to the Figure

Refer to the figure.
The figure shows the change in size (mean length) of predatory marine fish caught as trophy fish over a period of years off of Key West, Florida. What happened to the size of fish during this time?

A) Size remained stable throughout the time period.
B) Size decreased throughout the time period.
C) Size remained stable until about 1980 and then increased.
D) Size remained stable until about 1980 and then decreased.