In the early twentieth century, climatologist Milutin Milankovitch proposed that variations in Earth's orbit influence long-term climate patterns. Although his theory was initially met with skepticism, but subsequent research on deep-sea sediment cores confirmed that these orbital cycles correspond to past ice ages.
Which choice best replaces the underlined portion of the sentence?
- AAlthough his theory was initially met with skepticism, but subsequent
- BAlthough his theory was initially met with skepticism; subsequent
- Although his theory was initially met with skepticism, subsequentAnswer
- DHis theory was initially met with skepticism, subsequent
Answer
Although his theory was initially met with skepticism, subsequent
The correct choice properly subordinates the introductory clause. 'Although' is a subordinating conjunction that makes the first clause dependent. A comma is then used to connect this dependent clause to the independent clause that follows, without any redundant coordinating conjunctions.
Step-by-Step Solution
Key Concept
Subordination and Coordination