A recently discovered Native American artifact, preserved

A recently discovered Native American artifact, preserved since approximately 1345 AD, has been determined to be composed of woven acrylic by a scientist, a fabric previously thought to have been invented 632 years later.


(A) A recently discovered Native American artifact, preserved since approximately 1345 AD, has been determined to be composed of woven acrylic by a scientist, a fabric previously thought to have been invented 632 years later.

(B) Preserved since approximately 1345 AD, a recently discovered Native American artifact had been recently determined by a scientist to be composed of woven acrylic, a fabric previously thought to be invented 632 years later.

(C) A scientist had determined that a recently discovered Native American artifact is composed of woven acrylic, a fabric previously thought to be invented 632 years later, after having been preserved since approximately 1345 AD.

(D) After being preserved since approximately 1345 AD, a scientist has determined that a recently discovered Native American artifact is composed of woven acrylic, a fabric previously thought to have been invented 632 years later.

(E) A scientist has determined that a recently discovered Native American artifact, preserved since approximately 1345 AD, is composed of woven acrylic, a fabric previously thought to have been invented 632 years later.