Please assist with Calculus question

Find any critical points of the function f ( x ) = sin x + x on the interval [ 2 11 , 2 11]. Which of the following statements is true? (Only one is true.) 0 The only critical point is a point of inection at ( 11 , 11 ) . O The only critical point is a minimum point at ( 11 , 11 ) . 0 There are points of inection at ( 1T, 11 ) and (11 , 1T ) . O Thereareminimumpointsat(Tr , 11)and (11,11). 0 There are no critical points