C．stress hormones have lasting positive effects on the brain

　　D．short bursts of stress hormones improve memory function

　　E

　　Wugging, or web use giving, describes the act of giving to charity（慈善）at no cost to the user. By using Everyclick.com, which is being added to a number of university computers across the UK this week , students can raise money every time they search, but it won’t cost them a penny.

　　Research shows that students are enthusiastic about supporting charity, 88% of full time students have used the Internet to give to charity. This figure is high, considering this age group is often the least likely to have their own income. 19% of 22 to 24 years old have short-term debts of more than ￡5,000. With rising personal debt levels in this age group, due to university tuition fees or personal loans and a lack of long-term savings, traditional methods of donating to charity are often not appealing or possible.

　　Beth Truman, a 21-year-old recent university graduate has used Everyclick.com to donate to her chosen charity, the RSPCA, for two years and has seen the “wugging” movement grow popular with students. “When you’re at university you become more socially aware, but it’s sometimes hard to give to others when you have little money yourself.” says Beth. “Wugging is great for people in this age group as it allows them to use the technology on a daily basis to give it to charity, without costing them a single penny.”

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