What contraceptive has a failure rate of 28%

Spermicide is a contraceptive with a failure rate of 28 percent.

The answer to your question should be spermicide

After a long conversation with my father, i learned to take my responsibilities more seriously.hope this : )

Bmust be the answer, as technically all organs move, so a is incorrect. all organs are made of different types of cells, so that isn’t a problem, so c is also incorrect. human hearts are very similar to many other animals’ hearts, so d is also incorrect, yet the heart is made of muscle, which is hard to grow in the lab so it would be correct to say b