A transit of Venus or Mercury should be observed only with proper precautions,
because staring at the brilliant disk of the sun with the unprotected eye can quickly cause serious and often permanent eye damage.A. because staring at the brilliant disk of the sun with the unprotected eye can quickly cause serious and often permanent eye damage.
B. staring at the brilliant disk of the sun can quickly cause serious often permanent eye damage, with the unprotected eye.
C. because, quickly, often permanent eye damage can be cause by staring with the unprotected eye at the brilliant disk of sun.
D. often permanent eye damage is caused by staring at the brilliant disk of the sun, quickly causing serious eye damage to the unprotected eye.
E. because the unprotected eye can quickly be caused serious and often permanent eye damage when staring at the brilliant disk of the Sun.
Source 800score.com