According to Professor of Criminology Daniel Tuck, During the 1970s, when more people were executed than in any other decade, crimes rates actually rose 25 percent across the country (4).

What is wrong with this use of a direct quote?

It does not include quotation marks around Tuck's words.

Explanation:

Considering the sentence and the written style given in the question, it can be deduced that what is wrong with this use of a direct quote in the sentence is "It does not include quotation marks around Tuck's words."

This shows that there are no quotation marks to reveal the actual words taken out from Daniel Tuck's work.

Hence, ideally, the revised edition would be:

According to Professor of Criminology Daniel Tuck, "During the 1970s, when more people were executed than in any other decade, crime rates rose 25 percent across the country."

the answer is c. many americans held nativist or racist views