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the frozen woolly rhino mystery
and the surrounding sediment did provide clues. (25) it is believed that sasha may have been trapped in a mud bog. (26) the mud likely suffocated her and preserved her body. (27) this tragic but fortunate event helped protect sasha from decomposition. (28) the mud kept scavengers away, and the cold temperatures of the permafrost further preserved her remains.
(29) one remaining mystery is how sashas body ended up in the location where it was found. (30) tests on the sediment attached to her body indicated that it had been by water transported. (31) dr. prokop hypothesizes that a flood or river might have carried sashas body to its final resting place. (32) as the water receded, the woolly rhino was left behind, perfectly preserved in the frozen ground.
(33) while sashas remarkable journey has been partially mapped, the investigation into her life and environment is ongoing. (34) by studying this well - preserved woolly rhino, they hope to gain deeper insights into the ice age ecosystems and the species that inhabited them.

1. what revision, if any, should be made in sentence 30?

a. tests on the sediment attached to her body indicated that it had been transported by water.
b. tests on the sediment attached to her body indicated that the sediment had been by water transported.
c. being transported by water, tests on the sediment attached to her body were transported.
d. no change is needed.
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Explanation:

The original sentence "Tests on the sediment attached to her body indicated that it had been by water transported" has an incorrect word - order. The correct passive - voice construction should be "had been transported by water". Option A has the correct word - order for the passive construction. Option B has an incorrect word - order. Option C has a dangling modifier as "Being transported by water" seems to modify "tests" instead of "sediment".

Answer:

A. Tests on the sediment attached to her body indicated that it had been transported by water.