What Can We Say About the Observations of the Four

What can we say about the observations of the four large satellites of Jupiter before Galileo's telescopic observation of 1610?

A) The moons individually are bright enough to be visible to the naked eye, so they were undoubtedly observed before 1610. But such observations were not made public, most likely out of fear of contradicting established dogma.
B) The moons individually are bright enough to be visible to the naked eye, but their angular separation from bright Jupiter is too small to allow them to be resolved individually without a telescope. Therefore, they could not have been observed before 1610.
C) The moons individually are not bright enough to be seen without a telescope, so they could not have been observed before 1610.
D) The moons individually are not bright enough to be seen without a telescope, but a conjunction of all four does make them visible to the naked eye. There were a few reliable reports of such an observation before 1610.