Answer:
a. cross-sectional study.
Step-by-step explanation:
A cross-sectional study is the study that consists of data taken from a population for a particular period of time. Here study derives the interest variables that are be selected
Here in the given situation, since the company conducted a survey based on people attitudes, their preferences, intentions so that they can able to analyze purchasing the custom clubs
So here the cross sectional study is to be used
hence, the correct option is a.