以下哪个循环语句会无限次执行? ( )

{{ select(1) }}

• for (int a = 0; a; a++);
• for (bool b = false; b <= true; b++);
• for (char c = 'A'; c < 'z'; c++);
• for (double d = 0.0; d < 10.0; d += 0.001);