medium · SAT Reading & Writing

The development of sustainable aviation fuels (SAFs) is often hampered by high production costs and limited feedstock availability. Researchers at the University of Michigan, however, have identified a potential solution: using waste fats and oils from the food industry. This approach not only reduces waste ______ provides a cost-effective alternative to traditional petroleum-based fuels. Which choice completes the text so that it conforms to the conventions of Standard English?

1. as well as
2. but also
3. while it
4. and also

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