Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on the surface of the sun but have never been sighted on the sun's poles or equator.
A) are visible as dark spots on the surface of the sun but have never been sighted on
B) are visible as dark spots that never have been sighted on the surface of the sun
C) appear on the surface of the sun as dark spots although never sighted at
D) appear as dark spots on the surface of the sun, although never having been sighted at
E) appear as dark spots on the sun's surface, which have never been sighted on
OAA
Can I eliminate option C because correct idiom is appear to be, if no then please explain the reason to eliminate this option.
Thanks,
Kavin
A) are visible as dark spots on the surface of the sun but have never been sighted on
B) are visible as dark spots that never have been sighted on the surface of the sun
C) appear on the surface of the sun as dark spots although never sighted at
D) appear as dark spots on the surface of the sun, although never having been sighted at
E) appear as dark spots on the sun's surface, which have never been sighted on
OAA
Can I eliminate option C because correct idiom is appear to be, if no then please explain the reason to eliminate this option.
Thanks,
Kavin
