Final answer:
The celestial equator crosses your meridian at an altitude of 90° minus your latitude.
Step-by-step explanation:
The celestial equator crosses your meridian at an altitude equal to 90° minus your latitude. This is because the celestial equator is directly above the Earth's equator, and as you move north or south from the equator, the angle at which you see the celestial equator decreases correspondingly. Hence, at the poles (90° North or South), the celestial equator would be at the horizon (0° altitude), and at the equator (0° latitude), the celestial equator would be directly overhead (90° altitude). Therefore, the correct answer is A) 90° minus your latitude.