On a Camping Trip, You Pitch Your Tent on a Rock

On a camping trip, you pitch your tent on a rock that you can feel through your sleeping bag all night.Which mechanoreceptors are most likely to be giving you information about this uncomfortable rock?

A) Meissner's corpuscles, which are found primarily in non-hairy skin and are very sensitive but adapt rapidly and provide information about changes in things touching the skin
B) Merkel's discs, which adapt rather slowly and provide continuous information about anything touching the skin
C) Ruffini endings, which adapt slowly and are good at providing information about vibrating stimuli of low frequencies
D) Golgi tendon organs, which are found in tendons and ligaments and provide information about the force generated by contracting muscles
E) Sensory neurons that wrap around hair follicles