The is made of smooth muscle and under involuntary control, (by) the is made of skeletal muscle and under voluntary control. Both are muscles used to control the exit of urine in the urinary bladder through the urethra.

Which one is an advantage of external fertilization a. the offspring are genetically identical to the parents b. more eggs can be fertilzed at one time c. more sperm can be released at one time d. more protection is available for developing plz