Question

Astronomical observations indicate that most of the matter in the universe is dark matter. Three scientists present different hypotheses regarding the physical nature and detection of dark matter particles or objects.

Scientist 1
Dark matter is composed of Weakly Interacting Massive Particles (WIMPs). WIMPs are elementary particles with masses between $10 \text{ GeV/c}^2$ and $1,000 \text{ GeV/c}^2$ (roughly $10$ to $1,000$ times the mass of a proton). They were created thermally in the hot early universe. WIMPs interact with normal matter only through gravity and the weak nuclear force. This weak interaction allows them to occasionally scatter off atomic nuclei in deep underground detectors, producing a measurable nuclear recoil. WIMPs have no electromagnetic interactions.

Scientist 2
Dark matter is made of axions, which are extremely light, hypothetical particles with masses between $10^{-6} \text{ eV/c}^2$ and $10^{-3} \text{ eV/c}^2$. Axions are produced non-thermally during cosmic inflation. They do not interact via the weak force. Instead, they interact with electromagnetic fields: in the presence of a strong magnetic field, an axion can convert into a microwave photon. Detectors must use resonant microwave cavities inside powerful superconducting magnets to observe this conversion.

Scientist 3
Dark matter is not composed of new elementary particles at all, but rather of Primordial Black Holes (PBHs). These are macroscopic bodies with masses ranging from $10^{-16}$ to $100$ solar masses ($M_{\odot}$), formed from the collapse of extremely dense regions of space during the first fraction of a second after the Big Bang. PBHs interact with other matter exclusively through gravitational forces, including gravitational lensing, where their gravity bends the light of distant stars. They have no weak or electromagnetic interactions.

Based on the passage, match each specific claim regarding the physical interactions or detection methods of dark matter to the scientist who would support that claim.