Disturbances of dark material of a desert show up as light-colored lines. One group of lines branching out like rays from a single point crosses over curved lines that form a very large bird figure (group 2). An investigator argues that due to an unusual pattern, these lines must be landing strips for a spaceship rather than roads of an ancient civilization.
For someone that interprets these two groups of lines as referring to astronomical phenomena, which of the following most weakens the argument that these two groups of lines served unrelated purposes?
The correct answer choice (B) tells us that the straight lines (group 1 of lines) are consistent with points on the horizon that refer to certain astronomical events, and the bird figure (group 2 of lines) could represent a constellation. This answer choice provides a plausible explanation demonstrating that both groups of lines served astronomical purposes, thus weakening the argument that they were unrelated.
