**Core Concept**
The elevators of the eye are muscles responsible for upward gaze. This involves the **superior rectus** and **inferior oblique** muscles, which work together to elevate the eyeball.

**Why the Correct Answer is Right**
The **superior rectus** muscle is the primary elevator of the eye, responsible for elevating the eyeball. The **inferior oblique** muscle assists in this action, particularly when the eye is adducted. These muscles are crucial for controlling vertical eye movements.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not include the primary elevator.
**Option B:** Incorrect as it lacks the secondary elevator.
**Option D:** Incorrect due to the absence of both primary and secondary elevators.

**Clinical Pearl / High-Yield Fact**
Remember that the **superior rectus** and **inferior oblique** muscles are synergists in elevating the eye, and their dysfunction can lead to vertical strabismus.

**Correct Answer:** D. Superior rectus and inferior oblique.