bring best profits or lowest costs

c - - - - e - - - - - - - -

(a)  

study or examine something in detail

(a)  

methods and principles used to study something

(a)  

different beliefs or opinions

c - - - - - - - - - - - y

(a)  

p - - - - - -

(a)  

doubting that something is true or useful

sc - - - - - - -

(a)