As you read this paragraph about earthquakes, look for context clues that are provided to help readers understand the article’s scientific terms. Aftershocks, unlike earthquakes which are more powerful, generally follow the mainshock and occur in the same location. Aftershocks can continue for weeks, months, or years after the initial earthquake. Usually, the larger the earthquake, the larger and more numerous the aftershocks, and the longer they will continue.

Which phrase provides the BEST context clues for the meaning of aftershocks?

A. “continue for weeks, months, or years”
B. “the longer they will continue”
C. “the larger and more numerous the aftershocks”
D. “unlike earthquakes which are more powerful”