Answer:
The correct answer is (C) collect data to prove that jeans will sell more in January than in July.
Explanation:
This is because scientifically, steps to take to prove a cause are as follows:
...survey data, collect data, write a report, and assert the report respectively. Thus, since you already have an idea about how cold weather affects Jeans sale positively then the next main step is to collect various data to buttress your points to the company managements.