Answer:
D. use more neutral language so that it is not a leading question.
Explanation:
Construct validity: In a psychological experiment, the term construct validity refers to the phenomenon of a research or experiment to measure the things what the research or experiment has claimed. It signifies whether or not the operational definition of a specific variable potentially reflects the exact theoretical meaning following a concept.
In the question above, the given statement's question can be changed as "use more neutral language so that it is not a leading question", to improve its construct validity.