is divisible by

Correct option is D

Given:

Expression: $$6^{25} + 6^{26} + 6^{27} + 6^{28}$$​​
Concept Used:
Factoring the given expression as a multiple of $$6^{25}$$​​

Solution:
Now, we calculate$${6}^{25}(1 + 6 + 6^2 + 6^3)$$​​

$$6^{25}$$​(1 + 6 + 36 + 216 = 259)
​$$6^{25} \times 259$$​​

so, it is divisible by 259.