The correct answer is B: a landing page that is not accessible qualifies for a 'Did Not Load' flag, while a Special Content Results Block with minimal content does not. This is because the latter still technically loads, even if it's not very useful. A 'Did Not Load' flag is specifically for resources that are completely inaccessible.
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A 'Did Not Load' flag is used when a web resource is entirely inaccessible. Among the options, only the scenario of a landing page that is not accessible qualifies for this flag. Thus, option b is the correct answer. ;