Sentence Correction

A new study of the causes of autism that takes into account many factors ignored by previous studies indicate that a strong genetic component of the disease exists, but that several researchers are also examining the possibility that an environmental trigger exists.

that takes into account many factors ignored by previous studies indicate that a strong genetic component of the disease exists, but that

that takes into account many factors ignored by previous studies, that indicates that a strong genetic component of the disease exists, but that

taking into account many factors ignored by previous studies indicates that a strong genetic component of the disease exists, but

takes into account many factors ignored by previous studies and indicate that a strong genetic component of the disease exists, but

taking into account many factors ignored by previous studies are indicating the existence of a strong genetic component of the disease, but that

(C) for me.

IMO is C indicate/indicates.. usage of that clause.

C it is.

Pls provide your reasoning

mv12 wrote:C it is.

Pls provide your reasoning

kulhot wrote:(C) for me.

A new study of the causes of autism that takes into account many factors ignored by previous studies indicate that a strong genetic component of the disease exists, but that several researchers are also examining the possibility that an environmental trigger exists.

that takes into account many factors ignored by previous studies indicate that a strong genetic component of the disease exists, but that (agreement error with subject "study")

that takes into account many factors ignored by previous studies, that indicates that a strong genetic component of the disease exists, but that (sentence fragment; we don't have a true verb to go with the subject)

taking into account many factors ignored by previous studies indicates that a strong genetic component of the disease exists, but (fixes the agreement error and creates an effective compound sentence)

takes into account many factors ignored by previous studies and indicate that a strong genetic component of the disease exists, but (agreement error)

taking into account many factors ignored by previous studies are indicating the existence of a strong genetic component of the disease, but that (no need for an -ing verb, and "but that" should be "but")

OA is C