Ibelieve in the truth no matter what it is. a, telling b, to tell c, told d, tell

A - telling

This is present progressive tense. It combines the present tense with the continuous aspect (of always telling the truth). Present progressive tense usually end with -ing.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

no the answer is c only objects touching the earth's surface can be acted upon by an outside force