Comparing the Output of Strawberries Grown on Plots Using Fertilizer

Comparing the output of strawberries grown on plots using fertilizer A with that grown on otherwise identical plots using fertilizer B,in order to make a general assessment of relative fertilizer effectiveness,may well call for a:

A) Wilcoxon signed rank test.
B) Wilcoxon rank sum test.
C) Sign test.
D) Spearman rank correlation test.