The typical cost for cloud storage can vary by provider. However, if Marketa is looking for a specific amount of cloud storage like 100 GB, the pricing varies.
From the options given, if we assume common pricing patterns, $1.99 a month would total approximately $23.88 a year (which is a common price range for such storage), and $0.25 a month would total approximately $3 a year (which is unusually low for 100 GB).
Given those considerations, $50 a year is also a possibility, as that could be consistent with certain providers offering larger amounts of storage at annual rates.
Without specific provider details, $1.99 a month or $50 a year are the most likely realistic options. If I'd have to choose one based on more common pricing, then I would say:
$1.99 a month