General partners:

a. take an active part in the management of the firm.

b. have no liability for the firm's debts.

c. are nonparticipating investors.

d. they contribute cash, property but do not take part in the management of the firm.

Option A, take an active part in the management of the firm, is the right answer.

Explanation:

A general partner is an individual who aligns with at least one other individual to establish a partnership. In business, a general partner has accountability for the operations of the company, can legitimately connect the firm and is individually liable for all the debts and obligations of the business.]

In this way, the general partner has the liability for the debts of the firm, they actively participate in the affairs of the company and they also participate in the management of the firm, thus Option A, will be the right answer.