Answer:
Unilateral Contract — a contract in which only one party makes an enforceable promise. Most insurance policies are unilateral contracts in that only the insurer makes a legally enforceable promise to pay covered claims.
Believing that you are the president of the United States should be the right one. You are in a state of delusion, as in believing that you are the president, when you're actually not. It's also looked as a sign for mental disorders.
Users make payments electronically than in person. Electronic payments have been made to provide a secure internet transaction. It is usually in 4 categories namely credit card,debit card, micropayment system and electronic cash. The answer in the situation where Lina switch to new provider for the online payment system is due to self-service.