What Was the Result of the First Use of British

What was the result of the first use of British tanks in battle?

A) An arms race began, with Germans committing to developing tanks of their own.
B) The tanks' failure to function properly exacerbated soldiers' sense of despair.
C) The war on the western front at last moved beyond trench warfare.
D) Germans abandoned their trenches and breakthrough was finally achieved.
E) Allied morale soared and soldiers resumed trench warfare with renewed vigor.