Which sentence is an example of a concrete statement?

a. i have a bright future, and there are many different things that i want to do in my career.
b. my future goals include getting my zoology degree and working at woodland zoo as a zookeeper.
c. my goals for the future are to get a position that i could one day transition into a lifelong career.
d. in the future, i would like a position that will allow me to use my skills in the best way.