Answer:
C.
Explanation:
according to the condition it is possible to calculate the values of ∠DEF; ∠CDE and ∠DCF:
1) m∠DEF=m∠BAE=104°;
2) m∠CDE=180-m∠BAE=180-104=76°;
3) m∠DCF=m∠BAE-m∠BCF=104-60=44°;
the required value of the angle EFC is:
4) m∠EFC=360- (m∠DEF+m∠CDE+m∠DCF)=360-104-76-44=136°
5) the correct answer is: C. 136°.