IMO D.. if it is not an extreme answer

I chose D because I see will definitly in the main stem...

In this case I would chose C.

From my perspective the difference is in the probability of an event. If X does not intervene Y -> we are sure that the region will fall under enemy influence. But the event that X intervene Y, was not defined in the argument, but from the premise I slightly more believe that there is a higher chance that the region will not fall under enemy influence, rather 50/50 as the option E propose.

OA: E

I agree with OA.. Combining Martink's words with my guess above

We need to understand usage of will...box of worms it is...
I think will is for definite future.

may > will probably... will definitly is redundant i guess

Can someone kinldy teach me "Will"... these modal verbs has hit me often

Interesting, I think I have to get rid of my internal assumptions. If I worked like a robot, then I would definitely chose E .

If X does not happen, Y will definitely hapen.
this does not give us the freedom to assume, if X happens Y wmay not happen
or if X happens Y will not happen
we actaully cannot conclude anythng from the given premises abt the other scenario.
we cant get in our outside knowledge, as Martin point out for must be true, main point questions we better work off as robots
E will throw itself at you then.

abhishekpandey2002 wrote:Please explain the difference between option 'C' and 'E'

If Country X does not intervene militarily in Country Y, then the whole region will definitely fall under enemy influence.
It most logically follows from the statement above that, if Country X does intervene militarily in Country Y, then the whole region
(A) Will definitely fall under enemy influence
(B) Will probably fall under enemy influence
(C) Will probably not fall under enemy influence
(D) Will definitely not fall under enemy influence
(E) May or may not fall under enemy influence

Try the following Parable:

If the Us does not intervene in Vietnam, the region will surely fall under communist influence.
If c is right, then we are saying that if the US Does intervene, the region "will probably not fall under communist influence" - which history teaches us is not true.

The point was raised by the people above: the question says what will happen if the country does not intervene - but we cannot learn anything about the probable success of the other scenario. Based on the premises given in the argument (which don't really tells us anything), it's still a complete toss up what will happen if they do intervene - might as well be a 50 50 chance, as far as we know. The only thing we know for sure is what will happen if they do not intervene.