Why Is the Information Obtained from a Swab Culture of a Wound

Why is the information obtained from a swab culture of a wound limited?

A) A positive culture does not necessarily indicate infection,because chronic wounds are often colonized with bacteria.
B) A negative culture may not indicate infection,because chronic wounds are often colonized with bacteria.
C) Most wound infections are viral,so the swab culture would not be indicative of a wound infection.
D) A swab culture result does not include bacterial sensitivity information necessary to provide treatment.