C. The prisms have the same volume
Steps:
1. First you have to find the volume of the rectangular prism (l • w • h). 14 • 5 • 2= 140
2. Then you have to find the volume of the triangular prism (1/2a • c • h). 4 • 5 • 14= 280. 280 / 2= 140.
Both the volume of the rectangular prism and the triangular prism is 140