Which of the following is not true of mutations?

Which of the following is not true of
  mutations?
  a. They are always dangerous.
  b. They can occur as DNA replication errors.
  c. They cannot be repaired after replication.
  d. They may become cancerous.
  e. If in eggs or sperm the pass to the next
  generation.

Question 2

Which of the following is true of embryo
  cloning?
  a. It occurs all the time in nature.
  b. It involves the genetic contribution of two
  parents.
  c. It produces identical offspring.
  d. Artificial twinning is a laboratory
  application of the process.
  e. All of these are true