Answer:
C
Explanation:
The rectangular prism is composed of 3 pairs of congruent faces
top/ base
front/ back
2 ends
SA = 2(8 × 13) + 2(8 × 10.5) + 2(13 × 10.5)
= 208 + 168 +273
= 649 cm²
Increasing the dimensions by a factor of 2 increases the area by a factor of 2² = 4
new SA = 4 × 649 = 2596 cm² → C