Select the most appropriate ANTONYM of the underlined word in the given sentence.
This makes readers contemplate the motives people have for performing acts of charity.

The correct answer is overlook.

Understanding the Underlined Word:
In the given sentence, "This makes readers contemplate the motives people have for performing acts of charity," the word contemplate means to think deeply, ponder, reflect upon, or consider something carefully.

Analyzing the Options:
1. overlook: Means to fail to notice, ignore, or disregard something. This is the direct opposite (antonym) of thinking deeply about or contemplating something.
2. deviate: Means to depart from an established course or accepted standard.
3. follow up: Means to pursue or investigate further.
4. understate: Means to represent something as being smaller, less good, or less important than it really is.

Conclusion:
Since contemplate means to give serious thought or attention to something, its most appropriate antonym is overlook, which means to ignore or fail to pay attention to something.