20Use the paragraph below to answer questions :

Breast canceris the most common malignancy in women worldwide.Teahas anticarcinogenic effects againstbreast cancerin laboratorystudies. However, epidemiologic evidence thatteaprotects againstbreast cancerhas been inconsistent. Astudywas conducted inSoutheastChinabetween 2004 and 2005. The cases were 1009 female patients aged 20-87 years with histologically confirmedbreast cancer. The 1009 age-matched controls were healthy women randomly recruited frombreastdisease clinics. Information on duration, frequency, quantity, preparation, type ofteaconsumption, diet and lifestyle were collected by face-to-face interview using a validated and reliable questionnaire. Conditional logistic regression analyses were used to estimate odds ratios (ORs) and associated 95% confidence intervals. Compared with non-teadrinkers,greenteadrinkers tended to reside in urban areas, have better education and have higher consumption of coffee, alcohol, soy, vegetables and fruits. After adjusting established and potential confounders,greenteaconsumption was associated with a reduced odds ofbreast cancer. The ORs were 0.87 (0.73-1.04) in women consuming 1-249 g of driedgreentealeaves per annum, 0.68 (0.54-0.86) for 250-499 g per annum, 0.59 (0.45-0.77) for 500-749 g per annum and 0.61 (0.48-0.78) for >or=750 g per annum, with a statistically significant test for trend (P < 0.001). Similar dose-response relationships were observed for duration of drinkinggreentea, number of cups consumed and new batches prepared per day. We conclude that regular consumption ofgreenteacan protect againstbreast cancer. More research to closely examine the relationship betweenteaconsumption andbreast cancerrisk is warranted.

Which OR for the association of dried green tea leaves (which amount) presented by the study shows the strongest association between green tea and breast cancer?