Answer:
The answer is A.
Explanation:
In a laboratory test such as this, when you obtain a p Value of less than 0.5 you conclude that there is a significant difference between the treatment and the control and thus you reject the null hypothesis of no difference. Therefore, with a p Value of 4 and observing that the rats that received Omega 3 had a bigger reduction in their cancerous tumors, we conclude that the treatment with Omega 3 decreased the size of previous cancerous tumors and that this effect was statistically significant.