Please submit your concern

Explanation:

The third paragraph of the passage states that, “Materialists hope that we will one day be able to explain consciousness in purely physical terms. The problem with materialist approaches to the hard problem is that they always end up avoiding the issue by redefining what we mean by
‘consciousness’.”
The passage further states that, “They start off by declaring that they are going to solve the hard problem, to explain experience; but somewhere along the way they start using the word ‘consciousness’ to refer not to experience but to some complex behavioural functioning associated… But the hard problem of consciousness cannot be solved by changing the subject.”
Thus it is clear that the hard problem cannot be solved by the materialists.
Hence, the correct answer is option 2.