The answer is B - Rugged landscape of mountainous land
If Smiley weighs more than Jill's car, Smiley is too heavy for the bridge.
It has increased by 1.4 fahrenheit
I don't know your options, but there is one clear cause and effect relationship between the two:
As the agricultural methods advanced, people were more productive creating food. This means that not everyone had to engage in farming! And this allowed specialization for other jobs, just as smiths, which typically live in the cities.