Answer & Explanation: I have had great many travels by air and land and sea but I have never had one in a train before. This changed when I arrived London for the very first time. I have always had this idea that train journeys are long and stressful. However, they can be very short too, especially if you are on really fast trains like the one I had boarded. It was a train that conveyed me to towards the baggage train area where I was able to pick up my bags. It was an experience I would never forget - one that I am fond of.
I believe it is option "D.) The flu vaccine is not reliable enough to be worthwhile"
It would have a negative impact on the economy due to people not spending money to have the flu vaccine.