Answer:
Therefore,
The Equivalent expression is option A,

Explanation:
Given:
Expressions is

To Find:
Equivalent expression ?
Solution:
We have Law of indices

For option A
(1.08^t)^4

Hence option A is the Equivalent expression.
For option B
1.08^8t/1.08^2t

Which is not the Equivalent expression.
For option C
1.08^4*1.08^t

Which is not the Equivalent expression.
For option D
1.08^6t/1.08^2t

Which is not the Equivalent expression.
Therefore,
The Equivalent expression is option A,
