Working in the middle colonies was attractive because European immigrants here are my answers A. wanted to farm the fertile soil.
B. were skilled sailors.
C. planned to work in the timber industry.
D. wanted to become whalers.

Option A (wanted to farm the fertile soil) is the correct choice.

Explanation:

Continuing to work throughout the middle colonies seems to have been desirable, because although the soil type must have been desired by immigrants.  Most Europeans decided to move abroad to something like the British empire although, after already being oppressed by that same church, they decided to move to another country, individuals were searching for better work or those who decided to confess their faith of equality.Throughout the Americas, soil from several other areas was rich therefore suitable for planting. This would have been the circumstance with Virginia's Jamestown settlement, and perhaps other colonies like Pennsylvania.

The three other alternatives aren't related to the given instance. So that Option A would be the appropriate choice.

10 days if i’m not mistaken