The barrier to entry preventing quantum computing hardware from becoming more widely available is (Option B) - "They cost companies millions of dollars to manufacture"
What is Quantum computing?
Quantum computing is a field of research that focuses on the creation of computer-based technologies based on quantum theoretical concepts.
On the quantum (atomic and subatomic) level, quantum theory describes the nature and behavior of energy and matter.
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Full Question:
What is a barrier to entry preventing quantum computing hardware from becoming more widely available?
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
