Plz answer with explaination domt copy from chegg

On Bilateral agreements. Which statement is false on the bilateral agreements: a. Abilateral is a very long and detailed agreement on what rights each country gives each other regarding airline service. b. Every scheduled flight (passenger and cargo) that moves between two countries needs to be agreed upon in advance in a treaty between the two countries. C. A treaty between two airlines, not between any countries. d. The basis of the bilateral agreement is mainly ICAO and associated conventions