Which two options describe how a wildcard can be used when searching for services? (Choose two.)

Which two options describe how a wildcard can be used when searching for services? (Choose two.)
A . The wildcard (the * symbol) is used alone.
B . The wildcard (the * symbol) is used before and after service with no spaces (for example, *service*).
C . The wildcard (the * symbol) is used before and after service with spaces (for example, * service *).
D . The wildcard (the * symbol) is used before service with a space after the * (for example * service).

Answer: A,B