Tổng \(\overrightarrow {MN}  + \overrightarrow {PQ...

Câu hỏi: Tổng \(\overrightarrow {MN}  + \overrightarrow {PQ}  + \overrightarrow {RN}  + \overrightarrow {NP}  + \overrightarrow {QR} \) bằng:

A  \(\overrightarrow {MR} \).                                                    

B  \(\overrightarrow {MN} \).                                                   

C  \(\overrightarrow {MP} \).                                                    

D  \(\overrightarrow {MQ} \).