$.$ Given the following options, list them in order of preference $($with the most preferred means by which a company could meet these requirements at the top, and the least preferred means at the bottom$)$ and explain why you have listed them in that order.

$1.$ Cash with EDCs wrongful call insurance

$2.$ Standby L$/$C

$3.$ CCC as prime contractor $($assuming foreign govt responds to their request favorably$)$

$4.$ EDC