A Novel Dipstick Test for Identifying Urinary Tract Infections Is

A novel dipstick test for identifying urinary tract infections is being tested in a research facility (UTIs) . To establish diagnostic test parameters, the novel test is compared to urinalysis of a midstream urine specimen (considered the diagnostic gold standard) . The trial includes 300 individuals, 100 of whom had a UTI as diagnosed by urinalysis. The novel dipstick test has been shown to be 70% sensitive and 90% specific for the identification of UTIs. The study has how many false positives?  

A) 20
B) 30
C) 70
D) 120
E) 180