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The Lansing Art Society Our Lansing Art Society membership programme offers an introduction to some of the most exciting artists and exhibitions in the region and beyond. Member Benefits: For an annual subscription of $50($25 for students), you will receive a range of benefits: 1. An ongoing program of evening and weekend events, to which you are invited to bring a guest, including: artists talks studio visits curator-led exhibition tours private collection visits 20% discounted tickets for guests talks on emerging trends in contemporary practice and collecting 2. Admission fees are waived to members for our associated local galleries and museums. 3. Discounts on courses, publications and other promotional offers and also receive special discounts on parking. To join, visit the membership window next to our gift shop or download a membership application form. from our web site at www.lansingartsociety.org.
What is the purpose of the advertisement？
A．To introduce a new exhibition
B．To announce a promotion
C．To encourage membership
D．To introduce new members请帮忙给出正确答案和分析，谢谢！