Researchers Are Studying Individuals with a History of DVT to See

Researchers are studying individuals with a history of DVT to see if taking a daily ASA is associated with fewer repeat DVT's in this high risk population. They report a chi-square value of 158.6 with a p value of 0.01. They follow up with a study to examine if daily ASA versus daily warfarin is associated with fewer repeat DVT occurrences. They report a chi-square of 0.534 with a p value of 0.46. Based on this information what should they conclude?

A) Taking a daily ASA is associated with fewer repeat DVT's for those with a history of a DVT.
B) Taking Warfarin daily is significantly associated with fewer repeat DVT's for those with a history of a DVT.
C) Taking Warfarin daily is not significantly associated with fewer repeat DVT's for those with a history of a DVT.
D) Taking ASA or Warfarin is not significantly associated with fewer repeat DVT's for those with a history of a DVT.