6. What has happened as CAPTCHAs have gotten more challenging?
(A) Cyber crime has become less prevalent.
(B) Solving them has become more difficult for users.
(C) Websites have required multiple CAPTCHAs.
(D) More computer users have downloaded viruses.

答案：登入後查看
統計： A(1), B(18), C(2), D(1), E(0) #2344749

詳解 (共 1 筆)

#6479074
6. What has happened as CAPTCHAs have gotten more challenging?
✅ (B) Solving them has become more difficult for users.
✔ 文中提到：「legitimate Internet users are struggling more with deciphering 97% to 92%」，即 CAPTCHAs 越難，使用者越難辨識。
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