Choose the correct alternative which will improve the part of the sentence given in quotes.
The gas 'is being seeping' out of the rocks.

Options

A. is seeping
B. is seep
C. was being seeping
D. No Improvement

Answer

A

Explanation

Structure of sentence in Present Imperfect Tense
Subject+ is/am/are+ V-ing.
seep (Verb) : flow or leak slowly through porous material.
Hence, is seeping is the right usage.