When retrieving data from URLs, what are valid ways to make sure all file_get_contents calls send a certain user agent string? (Choose 2)
A. $default_opts = array(‘http’=>array(‘user_agent’=>"My Cool Browser")); $default = stream_context_set_default($default_opts);
B. stream_context_set_option("user_agent", "My Cool Browser");
C. ini_set(‘user_agent’, "My Cool Browser");
D. stream_context_set_option($context, "http", "user_agent", "My Cool Browser");
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