A、Find as many boats as possible. B、Cut trees and build rowing boats. C、Halt the operation until further orders. D、Ask the comma

M: Watch it, Mary.
W: What’s the matter?
M: This is the end of the road. There’s a river just beyond those trees.
W: Another river? I’ve never seen so many rivers anywhere in my life. Let’s go take a look.
M: This river is wide and deep.
W: Yeah, you are sure right about that. We aren’t going to be able to put any ordinary bridge across this one.
M: Do we have to get the trucks over to the other side?
W: That’s what they told me.
M: What about a ferry?
W: That’s what we’ll have to do if I can’t think of anything else, but it’ll really slow down the operation.
M: What about flying the equipment over in a helicopter?
W: We’d have to take the big trucks apart and then put them back together again. Slower than a ferry and a lot more expensive.
M: What are you going to do then?
W: Well, I’m beginning to get an idea. Have you ever heard of a pontoon bridge?
M: No. What’s that?
W: It’s a bridge that’s supported on boats. The boats are anchored at regular distances and they carry the weight of the bridge.
M: I guess that might work if you have enough boats, but won’t it take a long time to build them?
W: Maybe we can buy them.
M: Buy them?
W: From some of the native villagers. I’ve seen some fairly big rowing boats.
M: I don’t know about that. Most of those boats are pretty light.
W: Yeah, but if we tied up a bunch of them together, they might support a road. Let’s find out anyhow.
M: OK.
Question 1. What do the speakers say about the river beyond the trees?
Question 2. What were the speakers told to do?
Question 3. What does the woman think of flying the equipment over in a helicopter?
Question 4. What do the speakers decide to do finally?