The suggested answer is C.
S Static -
E EGP -
D EIGRP -
R RIP -
O OSPF -
Default Administrative distance of EIGRP protocol is 90 then answer is C.

Default Distance Value TableThis table lists the administrative distance default values of the protocols that Cisco supports:
Route Source -
Default Distance Values -
Connected interface -
Static route -
Enhanced Interior Gateway Routing Protocol (EIGRP) summary route External Border Gateway Protocol (BGP)
Internal EIGRP -
IGRP -
OSPF -
Intermediate System-to-Intermediate System (IS-IS) Routing Information Protocol (RIP) Exterior Gateway Protocol (EGP)
On Demand Routing (ODR)
External EIGRP -
Internal BGP -
Unknown*
C