C it is

Evidence: More and more computer programs that provide solutions to mathematical problems in engineering are being produced

Argument, premise 1: it is

thus increasingly unnecessary for practicing engineers to have a thorough understanding of fundamental mathematical principles

Argument, premise 2:

Consequently, in training engineers who will work in industry, less emphasis should be placed on mathematical principles

Inference:

so that space in the engineering curriculum will be available for other important subjects

I bolded the key words which lead to either the argument or the inference. Why is the 2nd bolded portion an inference? Because if you do what the 2 premises of the argument say, then you can infer that there will be more space for other important subjects.

Knowing that there will more room for other important courses is in no way a conclusion to:

1- minimizing the rigor of the math curriculum

2- minizing the emphasis on math concepts

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Best Regards,

Paul