下列哪个句子最符合科技英语写作规范？
A、 The company promises future improvements in tasks like networking, but, applications are still a sore point.
B、The company promises future improvements in tasks like networking, but applications are still a sore point.
C、The company promises future improvements in tasks like networking. But applications are still a sore point.
A、 The company promises future improvements in tasks like networking, but, applications are still a sore point.
B、The company promises future improvements in tasks like networking, but applications are still a sore point.
C、The company promises future improvements in tasks like networking. But applications are still a sore point.