Verbal Logic Quiz, August 21

What’s the Meaning of This?!

競合脱線 (kyōgō dassen)
     competition (1st 2 kanji) + derailment (last 2 kanji)

The word 競合 breaks down as to compete + to meet.
The word 脱線 breaks down as to take off + track.

What could 競合脱線 mean?!

a. train derailment due to two trains’ vying for the same place on the track
b. train derailment due to a head-on collision
c. train derailment due to a concurrence of causes
d. price competition between two train companies