Directions: Select the most appropriate filler(s) for the blank(s) such that the sentence makes coherent sense.

Sahara started ________ for planes and had formal presentations made to it by Boeing and Airbus.

Formal presentation made to it” in second part of the sentence means that Sahara has added Boeing and Airbus to their earlier fleet of airplanes. This implies that in first part of the sentence they would be searching for planes. “Scouting” is to go in search for something, therefore replaces the blank as it fits our prediction. “Probing” is investigation. “Convoying” and “patrolling” is guarding and watching.
“Spurning” is despising; reject with contempt. Hence, (1) is the answer.