Which of the following UPS types does the PS5000-E (50 kVA power module) belongs to? (Multiple Choice)

Which of the following UPS types does the PS5000-E (50 kVA power module) belongs to? (Multiple Choice)
A . Industrial frequency UPS
B . High frequency UPS
C . Rack and tower-mounted UPS
D . Modular UPS

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Answer: BD