An Older Adult with Gastroenteritis Is Disoriented and Weak and Has

An older adult with gastroenteritis is disoriented and weak and has the following laboratory test results:
Hct 56% (normal 40% to 51%)
BUN 32 mg/dL (normal 6 mg/dL to 20 mg/dL)
Which nursing diagnosis should the nurse select for this patient?

A) Risk for injury
B) Excess fluid volume
C) Deficient fluid volume
D) Impaired skin integrity