In the contract between Gamil's Building Materials store and Hightrees Logging and Lumber Company for the supply of lumber, there is a clause that allows either party to end the contract on $10-$days notice should actions of logging protesters on Hightrees property bring logging operations to a temporary halt. This clause is

Question $44$Select one:

a$.$

a force majeure clause.

b$.$

a frustration of contract clause.

c$.$

a condition subsequent clause.

d$.$

an example of laches.

e$.$

an option to terminate.