[单选题]
99.15: Given the graph of the velara5r q sf1 u);ud;ik 11zwtu;ocity vs. time of a dabnc x-da hm-f;m95eldp8n;fgtl fo 9,,m )3muck flying due south for the tl;axf; 9cdm ahb5m l n,gf,o9 -)dm3mf8enp- winter. At what point did the duck stop its forward motion?
A. point A
B. point B
C. point C
D. point D
E. None of these
