Answer:
b. An increase in accounts receivable
Explanation:
A: Equity is not an operating activities. It is a financing of a company. Therefore, increasing in equity cannot be the right choice.
C: Receive from long-term debt and paying to long-term debt are financing activities, therefore, it cannot be the answer.
B: Operating activities are day-to-day activities. And, collection from accounts receivable is a day-to-day activities for a firm. Hence, it is correct option.
Therefore, Increase in accounts receivable is the answer.
