Answer:
Step-by-step explanation:
It's A and it is very hard to do. You are talking to someone whom you don't know and interrupting their day when they might be expecting someone important to them to be calling.
The others might be describing something, but it is not cold calling.
D is a survey
C is potentially a hazard. If the competitor ever finds it out, you can be in a pile of trouble.
B might be a cold call. It might be the reason for making a cold call, but you have to define the term more generally.