Read this excerpt from a blog.

For decades, consumers have purchased eight- and twelve-ounce plastic water bottles, only to discard them minutes later. Our landfills are overflowing! Fortunately, activism is on the rise, and countless groups are encouraging a return to the tap. Many college campuses are discouraging the sale of water bottles, while others are building water "refilling stations” to promote reuse. One campaign has taken to the highways – look for a billboard near you encouraging tap-water consumption.

How does the writer of this blog promote change?

by sharing a personal story
by offering unfounded opinions
by raising awareness of a cause
by criticizing political leaders

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