When FedEx is looking for crews to fly its giant $777$ cargo aircraft, it wants to hire the very best people to whom to entrust its extremely expensive equipment. Therefore, it looks for $\_\_\_\_\_\_\_.$

Group of answer choices

only applicants from internal sources

only applicants from external sources

only pilots laid off from passenger carriers

many more applicants than there are positions to be filled

a very small number of applicants to reduce the time and costs required to examine the complex credentials of a larger number of applicants