Cryptozoology is a field of study aimed at proving the existence of mystery animals such as bigfoot and the loch ness monster. why is cryptozoology not considered a true science?

a .it uses creativity and imagination to develop its methods.
b. it is testable and changes as new evidence is discovered.
c. it is based on theories from the past and not on scientific laws.
d. it is based on anecdotal stories and not on evidence.