A tech company has decided to revamp its data centers with more sustainable infrastructure. Which of the following actions is NOT directly linked to creating a sustainable infrastructure?

a$.$

Investing in solar panels to power the data centers

b$.$

Replacing old hardware with energy$-$efficient models

c$.$

Upgrading the building insulation to reduce the need for artificial cooling$/$heating$.$

d$.$

Implementing a water$-$cooling system to reduce energy consumption of the servers

e$.$

Purchasing high$-$energy consuming server hardware because it's cheaper