The diaphysis of a long bone is composed of: A) a ring of spongy bone around a marrow-filled central channel.
B) a ring of compact bone around a marrow-filled central channel.
C) a ring of spongy bone around a central channel filled with compact bone.
D) a ring of compact bone around a central channel filled with spongy bone.

Ijust want the meaning to life (no wrong or right answers i just want your true opinion)

*edit* i took the test and i picked a and it was incorrect for its c! rank the following suggestions for preventing std, in order of increasing effectiveness. 1) using latex condoms properly 2) using spermicidal foam or jelly with a monogamous partner 3) abstaining from sexual intercourse and genital contact a. 1, 2, 3c. 2, 1, 3

Take a nutritional supplement during times of stress a. is recommended by al doctors as a stress management technique b. has been scientifically proven to aid in stress management c. only adds to the stress you’re feeling d. can you feel better because you believe it will you