Please help me with this I am struggling

Which of the following is not a possible cause of conduction deafness? a) cochlear nerve degeneration b) middle ear infection c) impacted cerumen d) otosclerosis

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4

Elderly nursing home residents tend to decline faster and die sooner than they would otherwise if they lacka)biofeedback.b)mindfulness meditation.c)perceived control.d)type a personalities