Krull dimension of local quotient ring and that of the original ring

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If $A/I$ is a d-dimensional local ring, and $I$ is generated by $h$ elements, can we have the conclusion that dim A $\leq h+d$ ?

I was actually reading Commutative ring theory by Matsumura. And my problem is on p.120 the proof of theorem 12.6, The inequality right before the last paragraph. I am not really sure the inequality came from the construction in the proof or just the statement I proposed.

Thanks for answering!