Answer:
a. All signatures must be notarized
Explanation:
Valid contract: The term "valid contract" is described as an expressed or a written contract between two different parties in order to provide or deliver a service or a specific product. There are four different elements of a valid contract including consideration, offer, agreement, and acceptance.
Example: A person got agreed to sell narcotics to a woman.
In the question above, the correct answer is option a.
