Final answer:
The correct option is a. The round ligament is responsible for suspending the uterus anteriorly by attaching near the uterine tubes and extending to the labia majora.
Step-by-step explanation:
The ligament responsible for suspending the uterus anteriorly is known as the round ligament. The round ligament attaches to the uterus near the uterine tubes and extends to the labia majora.
Other ligaments include the broad ligament, which is a wide structure that supports the uterus by attaching laterally to both sides of the uterus and pelvic wall, and the uterosacral ligament, which stabilizes the uterus posteriorly. The ovarian ligament, on the other hand, attaches the ovary to the uterus but does not suspend the uterus anteriorly.