（二）案例摘要：沉降硫磺30g，硫酸锌30g，樟脑醑250ml，羧甲基纤维素钠5g，甘油100ml蒸馏水加至1000ml。

以下关于助溶剂的叙述，哪一条是错误的（）

A.助溶剂的浓度与难溶性药物的溶解度呈直线关系或呈不规则关系

B.助溶剂的浓度与难溶性药物形成可溶性盐或分子复合物而达到助溶目的

C.能增加难溶性药物在水中溶解度而不降低其盐或分子复合物而达到助溶目的

D.助溶过程中，有时可产生起昙现象

E.苯甲酸用为助溶剂，使咖啡因在水中的溶解度增大，是由于苯甲酸与咖啡因形成分子复合物

Are you interested in seeing the beautiful fall foliage of New England but tired of traffic jams and overbooked hotels Then this year forget the crowds in New England and see the beautiful colors of autumn in the Catskills.
These rugged mountains in New York State, just 90 miles northwest of New York City, are famous for the legendary tales of Rip Van Winkle, and more recently for the summer hotels mat sprang up in the region during the 1940s, 1950s, and 1960s. Families trying to escape the heat of New York City found the Catskills to be the perfect place to stay for a month or so each summer. By the late 1950s there were over 500 resorts and hotels offering nighttime entertainment as well as all kinds of outdoor activities. Famous comedies like Jackie Gleason, Joan Rivers, and Sid Caesar all got their start touring the hotel clubs here. Since the introduction of air-conditioning and cheaper air travel, however, families have stopped coming to the Catskills in such large numbers, chasing instead more distant locations at different times of the year. Many of the Catskills hotels closed in the 1970s, but some remain and have expanded and changed their facilities to meet the needs of today’s visitors.
Currently, there are many activities available to the traveler besides witnessing the changing colors of the leaves. There is an all-organic sheep farm where visitors can see how a traditional sheep farm operates. There are also hundreds of miles of scenic drives in the area. Route 42, for instance, is an excellent site for spotting bald eagles. For more information on vacations in the Catskills, call the office of Public Information.

The word "rugged" underlined in Paragraph 2 means ______.

A. barren
B. rough
C. tall
D. lush