A. of a material and force applicable on the material, the students decided that the data that was collected for calculation was
"force applicable" suggests as there is a certain amount of force required,distorts the meaning. "data that was collected....was" ,as if collection happened as the same time as decided to be inadequate. incorrect
B. of and applied force on a material, the students had decided that the data that was collected for calculation is
"is" should be "was".inocrrect
C. and applied force of a material, the students decided that the data that was collected for calculation was
"applied force of a material" suggests the material itself has force.another, same error as A.incorrect
D. of a material and applied force on the material, the students decided that the data that had been collected for calculation was
seems fine
E. of a material and its applied force, the students decided that the data collected for calculation is
"its applied force",whose?? material's?? incorrect.."is" should be "was"
IMO D