Within what time should a decree of registration be reopened?

• A. Within four (4) years from the issuance of the decree of registration;
• B. Within 30 days from receipt of the decree;
• C. Within one (1) year from the issuance of the decree of registration; (Lopez v. Padilla, 45 SCRA 44; Eland Phils. Inc. v. Garcia, et al., G.R. No. 173289, February 17, 2010);
• D. Imprescriptible.