The option that is barrier to entry preventing quantum computing hardware from becoming more widely available is that They cost companies millions of dollars to manufacture.
Quantum computing is known to be an aspect of computing based on creating computer technology as a result of or on the principles of quantum theory.
Note that The option that is barrier to entry preventing quantum computing hardware from becoming more widely available is that They cost companies millions of dollars to manufacture.
See options below
a) They are limited to solving only intractable problems.
b) They cost companies millions of dollars to manufacture.
c) They need to be kept at a constant temperature of 0°C.
d) They are not expected to save data for more than a year.
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