I need some help with these problems, thank you so much!

Text Question 5.4 Question Help As the first of a new class of anti-ulcer drugs, Tagamet was extremely successful when it was introduced. However, the second entrant, Zantac, rapidly took the lion's share of the market. Zantac works similarly to Tagamet but has fewer side effects, could be taken less frequently when it was first introduced, and was Enter $2 promoted more effectively. X1 Enter The extensive-form game illustrated in the figure to the right shows the payoffs for Zantac Tagamet and Zantac entering the market, where Tagamet moves first. No entry $4 Suppose Zantac's profit from not entering is always zero and that Zantac's profit $0 from entering is always positive. Tagamet Zantac will have a higher profit than Tagamet, if Enter $0 X2 O A. Zantac's profit from entering when Tagamet enters is larger than $2. No entry Zantac O B. Zantac's profit from entering when Tagamet enters is smaller than $4. No entry $0 O C. Zantac's profit from entering when Tagamet does not enter is larger than $0 $2. O D. Zantac's profit from entering when Tagamet does not enter is larger than $0. O E. Zantac's profit from entering when Tagamet enters is larger than $0